include/cryptopp/twofish.h

0001 // twofish.h - originally written and placed in the public domain by Wei Dai

0002
0003 /// \file twofish.h

0004 /// \brief Classes for the Twofish block cipher

0005
0006 #ifndef CRYPTOPP_TWOFISH_H
0007 #define CRYPTOPP_TWOFISH_H
0008
0009 #include "seckey.h"
0010 #include "secblock.h"
0011
0012 NAMESPACE_BEGIN(CryptoPP)
0013
0014 /// \brief Twofish block cipher information

0015 /// \since Crypto++ 3.1

0016 struct Twofish_Info : public FixedBlockSize<16>, public VariableKeyLength<16, 16, 32, 8>, FixedRounds<16>
0017 {
0018     CRYPTOPP_STATIC_CONSTEXPR const char* StaticAlgorithmName() {return "Twofish";}
0019 };
0020
0021 /// \brief Twofish block cipher

0022 /// \sa <a href="http://www.cryptopp.com/wiki/Twofish">Twofish</a>

0023 /// \since Crypto++ 3.1

0024 class Twofish : public Twofish_Info, public BlockCipherDocumentation
0025 {
0026     class CRYPTOPP_NO_VTABLE Base : public BlockCipherImpl<Twofish_Info>
0027     {
0028     public:
0029         void UncheckedSetKey(const byte *userKey, unsigned int length, const NameValuePairs &params);
0030
0031     protected:
0032         static word32 h0(word32 x, const word32 *key, unsigned int kLen);
0033         static word32 h(word32 x, const word32 *key, unsigned int kLen);
0034
0035         static const byte q[2][256];
0036         static const word32 mds[4][256];
0037
0038         FixedSizeSecBlock<word32, 40> m_k;
0039         FixedSizeSecBlock<word32, 4*256> m_s;
0040     };
0041
0042     class CRYPTOPP_NO_VTABLE Enc : public Base
0043     {
0044     public:
0045         void ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const;
0046     };
0047
0048     class CRYPTOPP_NO_VTABLE Dec : public Base
0049     {
0050     public:
0051         void ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const;
0052     };
0053
0054 public:
0055     typedef BlockCipherFinal<ENCRYPTION, Enc> Encryption;
0056     typedef BlockCipherFinal<DECRYPTION, Dec> Decryption;
0057 };
0058
0059 typedef Twofish::Encryption TwofishEncryption;
0060 typedef Twofish::Decryption TwofishDecryption;
0061
0062 NAMESPACE_END
0063
0064 #endif